Cotter-pin tool



April 16, 1929.

B. F. THQMAS CUTTER PIN TOOL Filed Feb. 23, 1927 Patented Apr. 16, 1929.

UNITED STATES PATENT OFFICEQ BENJAMIN F. THOMAS, on SURPRISE, NEBRASKA.

COTTER-PIN TOOL.

Application filed lebruary 23, 1927; Serial No. 170,256.

Incidentally it is my object to providehandle ends for the tool which are especially adapted for straightening out cotter pins Which have become bent and to provide w re cutting aws for cutting cotter pins which require cutting.

Having in View these objects and others which will be pointed out in the following description, I will now refer to the drawings, in which Figure 1 is a side view of the entire cotter pin tool.

Figure 1 is a similar view of the jaw portion only of the cotter pin tool showing the jaws in their closed position.

Figure 2 is an edge view of the cotter pin tool. i

Figure 3 is tool. 7

Figurelis anillustration showing the cot ter pin tool in engagement through the eye of a cotter pin. I

The tool includes two pivoted portions which are secured together by means ofa pivot pin 10 as in pliers. \Vhile the figures show my preferred construction, it is obvious that any construction embodying two pivotally connected crossed arms will serve the purpose and I therefore wish it to be expressly understood that I do not limit myself to the particular form of pivotally connected crossed arms shown in my drawings.

The pivotally connected crossed arms which I show are provided with wire cutting an end view of the 'cottor pin portions 11 for convenience in cutting cotter pins and with tapering pointed ends 12 which are useful as levers in straighteningout bent and twisted cotter pins.

The main feature of the invention, however, resides in the interfitting jaws 13 and 14. The male jaw 13 tapers bluntly and the female jaw 14 is provided with a socket for receiving the joint of the jaw 13. As shown in Figure 1*, these jaws interfit in such a mannor that their exterior surfaces are smooth and contlnuous-and the center lines or lon-' gitudinal axes of theconical surfaces are in alignment.

The use of the tool is partially shown in V i Figure 4. Regardless of the position in which the cotter pin is found the head of the tool is small enough so that the tool may be readily caused to engage through the eye of a cotter pin. The pull may then beialong the are I ial line of the tool, but in some inaccessible places it will be necessary to turn the tool through an angle and then to pull the cotter pin with its eye engaging one or the other of the two aws. The tool cannot slip because the harder the pull on the tool, the harder the grip on the handles and consequently the harder the engagement between the jaws 13 and 14. i

Having thus described my invention in such full, clear, and exact terms that its construction and operation will be readily understood by others skilled in the art to which it pertains, what I claim as new and desire to secure by LettersPatent of the United States is l A cotter pin puller comprising a pair of pivotally connected crossed arms, said arms terminating respectively in curved interfitting m'ale and female jaw members, the .ex

tremity of said male jaw member being conical in form and the free end of said female, jaw member being provided with a conical socket for snugly receiving the conical por tion of said male jaw member in a manner such that the exterior surfaces and the longitudinal axes of said jaw members are each continuous when said male and female jaw portions are in their interfitting position, said I jaw members being adapted to engage the eye of a cotter pm 111 nonclamping relation whereby said cotter pin puller may be turned to any desired angular position with respect to the cotter pin so that either of said jaw members may function as a rolling fulcrum when pulling the cotter fpin. v

In'testimony whereof I aifixmy signature.

BENJAMIN F. THOMAS. 

